The Navigon MobileNavigator apps turned v2.0 today, and it’s safe to say that the apps have matured greatly. Included in the changes are a revamped main user interface, new menu groupings, a new MyMaps feature, and a new FreshMaps subscription and an in app purchase option for quarterly map updates.
Here's a quick demo of NAVIGON 2.0, the first onboard navigation app that allows users to download maps by state. You can simply pick the maps you need and download additional ones at a later point (WIFI connection required). Link